The top of the back reads "Brooklyn" and the bottom sums it up: Angels & Demons.
Johnny explained:
"It's just the passions of my life. I went through turmoil and came out of it. So, basically, I'm wearing on my skin, my griefs, my sins and my dislikes."
He couldn't be specific about who did what, but he said that the majority of the work was done by Coney Island Vinny and Michael Angelo, two staples of old-school Brooklyn tattooing.
Thanks to Johnny for sharing his back tattoos with us here on Tattoosday!